Open AccessExperimental realisation of micromachined terahertz electromagnetic crystal (EMXT) waveguide bandpass filter
Author(s) -
Lu Hongda,
Lv Xin,
Si Liming,
Wu Yuming,
Liu Yong
Publication year - 2014
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
ISSN - 1350-911X
DOI - 10.1049/el.2014.1354
Subject(s) - terahertz radiation , band pass filter , return loss , materials science , insertion loss , bandwidth (computing) , optics , waveguide , optoelectronics , surface micromachining , waveguide filter , filter (signal processing) , prototype filter , physics , low pass filter , antenna (radio) , computer science , electrical engineering , engineering , telecommunications , fabrication , medicine , alternative medicine , pathology
A terahertz (THz) micromachined waveguide bandpass filter based on metallic two‐dimensional (2D) electromagnetic crystal (EMXT) with a square lattice is proposed. The filter structure with three dual‐mode circular cavities and two rectangular waveguides is obtained by removing and optimising the EMXT unit cells in a 15 × 20 cells array. This filter, fed by WR2.2 waveguides, is fabricated with the silicon microelectromechanical systems technique and measured using a vector network analyser (VNA) with an extender. The measured fractional bandwidth is 7.6% with a 426.5 GHz centre frequency. The best insertion loss and return loss are 2 and 24 dB, respectively. These results agree well with the simulations. The proposed THz EMXT filter indicates a novel approach to obtain THz waveguide passive devices and has application potential in THz communication and detection.